:hi What is it exactly that you didn't understand. removing models and pics is the total reverse to importing. If you know how to import manually do the reverse to export. check Andy's tutorial.
For models: models are found either under EMD , EMD2 ,or EMD3.search for emd or emd 2 or emd 3 then search for the model id
for example the rock is 100 so the (000
10001..".) and (000
10002E.".) are responsible for the entrance and game model.
-the text in red is model id
-the text in blue is the attire id
-what is after the blue text is offset and size.
Remove the line for the model you don't want. After the name emd or emd 2 or emd 3 in the arc file there is a value in hex. subtract 300 for every 12 bytes you remove.(very important to do so)
Removing pictures is similar,but ids are found under ssfa ,ssfb and ssfc. every character has a picture under each of the mentioned catigories (ssfa,ssfb ssfc)and the information looks a little different for example the foc pic from ssfa 0
100;?A.
the red is the id you will be looking for under ssfa , ssfb ,and ssfc if you want to remove the pics.
similarly after the name ssfa ' ssfb and ssfc in arc file there is a value. However this time you subtract 200 only.

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Hope this was Helpful.